Using harcoded python paths is incompatibile with virtualenv

[mpurzynski]

Hey,

when trying to run fsf in a virtualenv, I noticed most files use hardcoded #!/usr/bin/python instead of #!/usr/bin/env python - thus it ignores the overwrite that virtualenv does.

Could you make fsf virtualenv compatible with this simple change? :)

[jxb5151]

Certainly! Thanks for bringing this up. Hopefully sometime after break.

[akniffe1]

merged in development branch.

[jxb5151]

Changed in master, noted in changelog. Thanks.